In short, don’t buy, they are not worth it as claim.
There are many knock-offs OEM battery for Samsung Galaxy phones which claim that their batteries are better than the original in terms of the capacity (in this Note 3 battery, original is 3200mAh, the gold battery is 4200mAh). These OEM batteries have a few problems:
– the lifespan usually shorter than the Samsung original
– for original Samsung batteries that support NFC, these knock offs are not NFC-compatible